What is the tolerance for a 100 mm f7 shaft?

A 100 mm f7 shaft runs 99.929 to 99.964 mm — deviations of -71 to -36 µm, a band 35 µm wide.

What is the maximum and minimum size of a 100 mm f7 shaft?

Maximum 99.964 mm, minimum 99.929 mm. Anything outside that band is a reject at 20 °C, not a judgement call.

Why is the IT7 band 35 µm at 100 mm?

Because 100 mm falls in the ISO 286 size band over 80 up to 120 mm, and IT7 is defined per band rather than per size. Every nominal size in that band carries the same 35 µm width for IT7.

What shaft goes in a 100 mm f7 hole?

At 100 mm the standard pairs run from H7/h6 (0 to +57 µm clearance) through transition to interference fits — the full list with clearances is on this page.

What does the f in f7 mean?

Close running clearance. It fixes the fundamental deviation — the limit nearest the nominal size — while IT7 fixes the width of the band, which at 100 mm is 35 µm.

ISO 286 · f7 shaft · Ø100 mm

100 mm f7 Tolerance — Shaft Limits in mm and µm

https://shopmath.org/fits/f7/100mm · data verified August 1, 2026

A 100 mm f7 shaft is 99.929 to 99.964 mm — deviations of -71 to -36 µm on an IT7 band 35 µm wide. Close running shaft — the standard choice for lubricated journals at moderate speed. Values apply at the ISO 286 reference temperature of 20 °C.

Nominal: 100 mm
Designation: f7
Feature: shaft
Grade: IT7
Band: 35 µm

100 mm f7 shaft · limits, mm

99.929 … 99.964

Upper dev: -36µm
Lower dev: -71µm
Band: 35µm

Measured at 20 °C on a plain cylindrical feature. The IT7 grade sets the 35 µm width; the f sets where the band sits.

Limits for a 100 mm f7 Shaft

Deviations in micrometres, finished limits in millimetres. Both describe the same band — the deviation is what a drawing carries, the limit is what a gauge reads.

100 mm f7 shaft tolerance — deviations and limits
Limit	µm	mm
Upper deviation	-36	-0.036
Lower deviation	-71	-0.071
Maximum diameter	-36	99.964
Minimum diameter	-71	99.929
Tolerance band (IT7)	35	0.035

Deviations are relative to the 100 mm nominal size. Values apply at the ISO 286 reference temperature of 20 °C; a part measured warm is not at these limits.

ISO 286 Tolerance Grades at 100 mm

100 mm falls in the ISO 286 size band over 80 to 120 mm, so every tolerance in that band has the same width regardless of which letter it carries.

ISO 286 standard tolerance grades at 100 mm nominal size
Grade	Tolerance, µm	Tolerance, mm
IT5	15	0.015
IT6	22	0.022
IT7	35	0.035
IT8	54	0.054
IT9	87	0.087
IT10	140	0.140
IT11	220	0.220
IT12	350	0.350

The grade sets the width of the band; the letter sets where that band sits relative to the nominal size.

Every Other ISO 286 Tolerance at 100 mm

The same nominal size under every other designation in this reference — the comparison that decides whether a feature is called out f7 or something looser.

ISO 286 hole and shaft tolerances at 100 mm nominal size
Property	Property	Deviation, µm		Limits, mm
Designation	Applies to	Upper	Lower	Min	Max
c11	shaft	-170	-390	99.610	99.830
d9	shaft	-120	-207	99.793	99.880
e8	shaft	-72	-126	99.874	99.928
f7	shaft	-36	-71	99.929	99.964
g6	shaft	-12	-34	99.966	99.988
h11	shaft	0	-220	99.780	100.000
h6	shaft	0	-22	99.978	100.000
h7	shaft	0	-35	99.965	100.000
h9	shaft	0	-87	99.913	100.000
k6	shaft	+25	+3	100.003	100.025
m6	shaft	+35	+13	100.013	100.035
n6	shaft	+45	+23	100.023	100.045
p6	shaft	+59	+37	100.037	100.059
r6	shaft	+73	+51	100.051	100.073
F8	hole	+90	+36	100.036	100.090
G7	hole	+47	+12	100.012	100.047
H11	hole	+220	0	100.000	100.220
H6	hole	+22	0	100.000	100.022
H7	hole	+35	0	100.000	100.035
H8	hole	+54	0	100.000	100.054
H9	hole	+87	0	100.000	100.087
K7	hole	+10	-25	99.975	100.010
N7	hole	-10	-45	99.955	99.990
P7	hole	-24	-59	99.941	99.976

Links go to that designation's page for this size where one exists, and to its full size table otherwise.

Standard Fits Available at 100 mm

What each standard hole/shaft pair gives at 100 mm, loosest first. Negative clearance is interference.

ISO 286 fits and their clearance at 100 mm nominal size
Property	Property	Clearance, µm		Property
Fit	Type	Min	Max	What it is for
H7/h6	clearance	0	+57	Locational clearance. Assembles by hand, no free movement intended.
H11/c11	clearance	+170	+610	Loose running. Wide commercial tolerances, large clearance for dirt, paint and thermal growth.
H9/d9	clearance	+120	+294	Free running. Good where accuracy is not essential and clearance can be generous.
H8/e8	clearance	+72	+180	Running fit with room for a lubricant film at speed.
H8/f7	clearance	+36	+125	Close running. The general-purpose lubricated journal fit.
H7/g6	clearance	+12	+69	Sliding. Locates accurately, still moves and turns freely.
H7/k6	transition	-25	+32	Locational transition. Accurate location, assembles with light force.
H7/m6	transition	-35	+22	Locational transition, tighter than k6.
H7/n6	transition	-45	+12	Tight transition. Usually a press job.
H7/p6	interference	-59	-2	Locational interference. Rigid location in steel without the load capacity of a drive fit.
H7/r6	interference	-73	-16	Medium drive. The joint itself carries load.
F8/h7	clearance	+36	+125	Close running, shaft basis.
G7/h6	clearance	+12	+69	Sliding, shaft basis. The h6 shaft is the reference and the hole carries the clearance.
K7/h6	transition	-25	+32	Locational transition, shaft basis.
N7/h6	transition	-45	+12	Tight transition, shaft basis.
P7/h6	interference	-59	-2	Locational interference, shaft basis.

Minimum clearance is the largest shaft in the smallest hole; maximum clearance is the smallest shaft in the largest hole.

Sources and Method for the 100 mm f7 Tolerance

100 mm f7 limitscomputed

limits computed from the compiled ISO 286 tables: ISO 286-1 IT grades and ISO 286-2 fundamental deviations, compiled from saucecode/ISO286 (LGPL-2.1) and parkergreene/isofits (MIT), cross-checked cell-for-cell

Verified against parkergreene/isofits ISO 286-2 limit tables (MIT); ISO 286-1 formula harness — 2067 checks passed

Computed from the standard's formulas, then checked against published tables.

IT tolerance gradescompiled

ISO 286-1 IT grades and ISO 286-2 fundamental deviations, compiled from saucecode/ISO286 (LGPL-2.1) and parkergreene/isofits (MIT), cross-checked cell-for-cell

Verified against parkergreene/isofits ISO 286-2 limit tables (MIT); ISO 286-1 formula harness — 2067 checks passed. Formula per ISO 286-1 standard tolerance factor and fundamental deviation formulas, used as a validation harness only per docs/research/data-sourcing.md §3.6

Compiled from independent public sources that agree cell-for-cell.

Formula

Limits from the deviations at 100 mm

max Ø  =  100 mm + (-36 µm)  =  99.964 mm
min Ø  =  100 mm + (-71 µm)  =  99.929 mm

The deviations are compiled from the ISO 286-2 tables; the limits are those deviations applied to the nominal size.

Assumptions

Values apply at the ISO 286 reference temperature of 20 °C.
Size only. Form, roundness, cylindricity and surface finish are separate callouts and a part inside these limits can still be unusable without them.
Dataset scope: COMPILED not computed: the ISO 286-1 formula deviates up to 13.26% from the table and is used only as a harness (warn >5%, fail >15%). EXCLUDED: shaft/hole letters s, t, u and the fits H7/s6, H7/t6, H7/u6 — no free source and an undetermined step constant in the formula.

Data last verified

August 1, 2026

How this data is built and checked →

How to Cite This 100 mm f7 Tolerance Reference

Citation

ShopMath. "100 mm f7 Tolerance — Shaft Limits in mm and µm." ShopMath, verified August 1, 2026, https://shopmath.org/fits/f7/100mm

BibTeX

@misc{shopmath-fits-f7-100mm,
  title        = {100 mm f7 Tolerance — Shaft Limits in mm and µm},
  author       = {{ShopMath}},
  year         = {2026},
  howpublished = {\url{https://shopmath.org/fits/f7/100mm}},
  note         = {Data verified 2026-08-01}
}

Permanent URL

https://shopmath.org/fits/f7/100mm

Common Questions About the 100 mm f7 Tolerance

What is the tolerance for a 100 mm f7 shaft?: A 100 mm f7 shaft runs 99.929 to 99.964 mm — deviations of -71 to -36 µm, a band 35 µm wide.
What is the maximum and minimum size of a 100 mm f7 shaft?: Maximum 99.964 mm, minimum 99.929 mm. Anything outside that band is a reject at 20 °C, not a judgement call.
Why is the IT7 band 35 µm at 100 mm?: Because 100 mm falls in the ISO 286 size band over 80 up to 120 mm, and IT7 is defined per band rather than per size. Every nominal size in that band carries the same 35 µm width for IT7.
What shaft goes in a 100 mm f7 hole?: At 100 mm the standard pairs run from H7/h6 (0 to +57 µm clearance) through transition to interference fits — the full list with clearances is on this page.
What does the f in f7 mean?: Close running clearance. It fixes the fundamental deviation — the limit nearest the nominal size — while IT7 fixes the width of the band, which at 100 mm is 35 µm.

All 13 f7 sizes · ISO 286 tolerance chart · Every designation and fit